Couple of ideas. One of the most common problems that I see is that people tend to overtighten their masks. This squats out the inner seal and makes any mask leak a little (sometimes a lot). An indication of this is whether you have any mask lines on your face when you finish a dive. If so, loosen it on both sides and give it another try. It doesn't have to be real tight. In fact, for me, what's loose enough for diving is too loose for snorkeling. It will obviously become tighter as you go deeper. I have a bunch of facial hair so my mask always leaks a little but a technique that I use that keeps it clear is to exhale a little through my nose on every breath out. Once you become used to it, you never have any water to speak of in your mask. One last idea: try positioning your mask differently, up and down. On many people, they leak if they're right against the nose but not if they're a little lower. Good luck..tom